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Transition of Drift Wave Instability Driven by Parallel Flow Velocity Shears in Hybrid Ion Plasmas

S. Tamura, T. Kaneko, R. Hatakeyama

Fusion Science and Technology / Volume 55 / Number 2T / February 2009 / Pages 110-113

Technical Paper / Seventh International Conference on Open Magnetic Systems for Plasma Confinement /

A transition of the drift wave instability driven by the parallel ion flow velocity shears is observed by controlling the ion density ratio in hybrid ion plasmas. Furthermore, an anomalous decrease in the fluctuation an amplitude is observed in the transition process, which is considered to be caused by enhancement of an ion Landau damping effect due to mixing of two unequal-mass ion species.

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